Improvement in wash-boards



Z Sheets-Sheet 1.

J. o. BENTLEY;

WASH-BOARD. Nop18Z,546 r Patented Sept. 26,1876.

UNITED STATES PATENT OFFICE;

JEFFREY O. BENTLEY, OF PHILADELPHIA, PENNSYLVANIA.

'.IMPRovEMEN-r IN zwAsH-.BoA'RDs Specification forming part of LetterePatent No. 182,546, dated September 26, 1876; application filed AFebruary 9, 1876.

To all 'whom it may concern:

Beit known that I, JEFFREY O. BENTLEY, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented a HollowRadiatin g Metallic WashBoard, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings.

My invention consists of a hollow washboard, for the circulation ofsteam. It is formed of sheet or cast metal, having in .its rear side ahot-air chamber, into which the air passes at the line of the floor, andfrom which it passes above the wash-board into the room in its heatedstate, produced from radiation from the rear side of the Wash-board.There is also radiation from the front, which assists in warming theroom. I prefer making the rear side of the wash-board corrugated, asgiving the maximum amount of heating-surface; but any other irregularform may be used, or the shape may be simply of box-form, if desired.

In the accompanying drawings, Figure l is a front view of my improvedwash-board. Fig. 2 is a vertical section at the line-:1c cc of Fig. l.Figs. 3 and et show a modification of the invention.

Like letters of vreference in both figures inl dicate the same parts.

A represents a wall between two rooms. On the side there is awash-board, B, formed of a sheet of metal, part of which is corrugated,to form steam-spaces c a ct, and part left plain, to form the front ofthe board, the edges of the sheet being closed and the joints madesteam-tight by Asoldering or otherwise. The corrugations in front touchthe front and hat part of the plate, but need not make a tight jointwith the same, as the steam may circulate from one space to another, theobject of the corrugations being to obtain as much radiating-surface forthe rear of the board as possible, to heat the air in the chamber C.

There areindentations b at the line where the front extensions of thecorrugations meet the vertical part of the sheet for the downwardpassage of any water formed by the condensation of the steam. Betweenthe lower edge of the wash-board and the floor Dfthere is anair-passage, d, through which cold air passes from the room into thehot-air chamber C.

As the air becomes heated in said chamberand thereby rarefied, andascends, it passes out of the same through the passage e, between theupper edge of the wash-board and the lower edge of the molding F, whichis made of sheet metal, to increase the capacity of the hot-air chamber.

On the other side of the wall A there is a channels, I indent the sheetof metal at suitable distances apart, where theeorrugations meet theback and flat part of the sheet, as at the points b, to allow the freepassage of steam, and thus prevent condensation along the lines ofcontact.

I do not conne myself to forming the rear. side of the sheet or sheetsforming the wash: board with corrugations, as zigzag or other irregularforms will partially accomplish the end in view of increasing theradiating-surface; nor do I confine myself to making the front side ofthe board a plain iiat surface, as any desirable form may be used.

If desired, a plain box-form may be adopted for the wash-board when madeof either sheet or cast metal, or the steam-spaces may be made bycombining two sheets of corrugated metal together to form a panel, as inFigs. 3 and 4. The edges may be covered by strips of metal, exceptenough at one end to form an open communication with the boiler orheater.

My hollow wash-board or panel may be used for the circulation of eithersteam or hot air.

I claim as my inventiont l. A hollow wash-board formed of sheet or castmetal, for the circulation of steam or hot air, it being constructed andarranged in relation to the wall to radiate the heat into the 4. The'reflectors H, rin combinationwith a,

'room from both its front and rear surfaces, a. hollow metallicWesh-boardend the hot-air f substantially as and for the purpose setforth. chamber7 substantially as and for the purpose 2. The hot-airchamber C, having an inletset forth. f passage, d, and anoutlet-passage, e, in combination with a. hollow metallic Wash-board,sub- JEFFREY O. BENTLEY. stantially as and for the purpose set forth. y

3. Ahollow wash-boardmade of sheet oroast Witnesses:

metal, with eorrug'ations at its rear side, sub- THOMAS J. BEWLEY,y

stantelly as and for the purpose set forth. STEPHEN USTICK.

